linux-kernel - [PATCH] gpio: em: Fix checking return value of irq_alloc

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Date:	Tue, 28 Aug 2012 19:30:44 +0800
From:	Axel Lin <axel.lin@...il.com>
To:	Linus Walleij <linus.walleij@...aro.org>,
	Grant Likely <grant.likely@...retlab.ca>
Cc:	Magnus Damm <damm@...nsource.se>, linux-kernel@...r.kernel.org
Subject: [PATCH] gpio: em: Fix checking return value of irq_alloc_descs

irq_alloc_descs() returns negative error code on failure.

Signed-off-by: Axel Lin <axel.lin@...il.com>
---
 drivers/gpio/gpio-em.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpio/gpio-em.c b/drivers/gpio/gpio-em.c
index ae37181..ec48ed5 100644
--- a/drivers/gpio/gpio-em.c
+++ b/drivers/gpio/gpio-em.c
@@ -247,9 +247,9 @@ static int __devinit em_gio_irq_domain_init(struct em_gio_priv *p)
 
 	p->irq_base = irq_alloc_descs(pdata->irq_base, 0,
 				      pdata->number_of_pins, numa_node_id());
-	if (IS_ERR_VALUE(p->irq_base)) {
+	if (p->irq_base < 0) {
 		dev_err(&pdev->dev, "cannot get irq_desc\n");
-		return -ENXIO;
+		return p->irq_base;
 	}
 	pr_debug("gio: hw base = %d, nr = %d, sw base = %d\n",
 		 pdata->gpio_base, pdata->number_of_pins, p->irq_base);
-- 
1.7.9.5



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